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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.bgpio.types.attr;
import java.util.Objects;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.types.BGPErrorType;
import org.onosproject.bgpio.types.BGPValueType;
import org.onosproject.bgpio.util.Validation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.MoreObjects;
/**
* Implements BGP MPLS protocol mask attribute.
*/
public class BgpLinkAttrMplsProtocolMask implements BGPValueType {
protected static final Logger log = LoggerFactory
.getLogger(BgpLinkAttrMplsProtocolMask.class);
public static final int ATTRLINK_MPLSPROTOMASK = 1094;
public static final int MASK_BYTE_LEN = 1;
private final boolean bLdp;
private final boolean bRsvpTe;
public static final byte FIRST_BIT = (byte) 0x80;
public static final byte SECOND_BIT = 0x40;
/**
* Constructor to initialize the values.
*
* @param bLdp boolean value true if LDP flag is available
* @param bRsvpTe boolean value true if RSVP TE information is available
*/
public BgpLinkAttrMplsProtocolMask(boolean bLdp, boolean bRsvpTe) {
this.bLdp = bLdp;
this.bRsvpTe = bRsvpTe;
}
/**
* Returns object of this class with specified values.
*
* @param bLdp boolean value true if LDP flag is available
* @param bRsvpTe boolean value true if RSVP TE information is available
* @return object of BgpLinkAttrMplsProtocolMask
*/
public static BgpLinkAttrMplsProtocolMask of(final boolean bLdp,
final boolean bRsvpTe) {
return new BgpLinkAttrMplsProtocolMask(bLdp, bRsvpTe);
}
/**
* Reads the BGP link attributes MPLS protocol mask.
*
* @param cb Channel buffer
* @return object of type BgpLinkAttrMPLSProtocolMask
* @throws BGPParseException while parsing BgpLinkAttrMplsProtocolMask
*/
public static BgpLinkAttrMplsProtocolMask read(ChannelBuffer cb)
throws BGPParseException {
boolean bLdp = false;
boolean bRsvpTe = false;
short lsAttrLength = cb.readShort();
if ((lsAttrLength != MASK_BYTE_LEN)
|| (cb.readableBytes() < lsAttrLength)) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
lsAttrLength);
}
byte flags = cb.readByte();
bLdp = ((flags & (byte) FIRST_BIT) == FIRST_BIT);
bRsvpTe = ((flags & (byte) SECOND_BIT) == SECOND_BIT);
return BgpLinkAttrMplsProtocolMask.of(bLdp, bRsvpTe);
}
/**
* Returns true if LDP bit is set.
*
* @return True if LDP information is set else false.
*/
public boolean ldpBit() {
return bLdp;
}
/**
* Returns RSVP TE information.
*
* @return True if RSVP TE information is set else false.
*/
public boolean rsvpBit() {
return bRsvpTe;
}
@Override
public short getType() {
return ATTRLINK_MPLSPROTOMASK;
}
@Override
public int hashCode() {
return Objects.hash(bLdp, bRsvpTe);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof BgpLinkAttrMplsProtocolMask) {
BgpLinkAttrMplsProtocolMask other = (BgpLinkAttrMplsProtocolMask) obj;
return Objects.equals(bLdp, other.bLdp)
&& Objects.equals(bRsvpTe, other.bRsvpTe);
}
return false;
}
@Override
public int write(ChannelBuffer cb) {
// TODO This will be implemented in the next version
return 0;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("bLdp", bLdp).add("bRsvpTe", bRsvpTe).toString();
}
}
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